Potamyia flavata ( Banks 1934 )

Pandher, Manpreet Singh, Kaur, Simarjit & Parey, Sajad Hussain, 2025, New records of Hydropsychinae (Insecta: Trichoptera: Hydropsychidae) from Assam, India, Zootaxa 5594 (2), pp. 377-386 : 383-385

Potamyia flavata ( Banks 1934) NEW RECORD for India

( Figs 12–16 )

Hydropsyche flavata Banks 1934 , 17: 569.

Potamyia flavata ( Banks 1934) ;

male redescribed in the Potamyia czekanovskii Group ( Oláh et al. 2006); listed in the Potamyia czekanovskii Group ( Oláh & Johanson 2008); larva and pupa described ( Maneechan et al. 2018).

Material examined. India: Assam; Baksa Manas National Park , 26°42’24.24”N, 91° 6’26.77”E, 72 m 18.x.2022, 3 males, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 15.x.2022, 1 male, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 15.x.2022, 1 male, 2 females, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 16.x.2022, 36 males, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 17.x.2022, 34 males, 1 female, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 17.x.2022, 23 males, 2 females, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 16.x.2022, 12 males, 3 females, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 16.x.2022, 6 males, 2 females, Pandher, ( HARC, ZSI Solan) ; Assam; Baksa, Manas National Park , 16.x.2022, 10 males, 5 females, Pandher, ( HARC, ZSI Solan) .

Diagnosis. The male genitalia of Potamyia flavata are similar to those of Potamyia nikalandugola ( Schmid 1958) reported from Sri Lanka. However, the body of tergum X in P. flavata in dorsal view is almost quadrangular, apically has triangular setose lobes; the interlobular gap is very small and V-shaped; the setose area is well defined (probably mesal setose lobes). In contrast, in P. nikalandugola the quadrangular body of tergum X, apically has hooked setose lobes with apices bent outward and the interlobular gap is broader and more or less U-shaped in dorsal view.

Redescription. Overall color in alcohol pale yellowish, maxillary and labial palps pale. Head yellowish, antennae pale yellowish, legs pale. Body covered with scattered light golden pubescence. Wings pale, membranes faint brown, with pale maculation and reticulate pattern. Length from tip of head to apices of folded forewings about 7.10 mm (n = 12). Length of each forewing 6.00 mm. Length of each hind wing 4.25 mm.

Male genitalia ( Figs 12–16 ). In lateral view ( Fig.12 ), abdominal segment IX annular, anteriorly convex, narrower both dorsally and ventrally; apical lobe on posterolateral margin well developed, subtriangular and apically round. In lateral view ( Fig. 12 ), body of tergum X very short, quadrangular; hooked dorsad in apical 1/3; in dorsal view almost quadrangular, apically forming triangular setose lobes; interlobular gap very small and V-shaped; setose areas well defined (probably mesal setose lobes) with variably long setae. Inferior appendages each two-segmented, in lateral and ventral views ( Figs 12, 14 ) basal segment slender and curved slightly dorsad sub-basally, thicker and curved posterad apically; apical segment thick and directed mesad, with fine hook visible apically in both lateral ( Fig. 12 ) and dorsal views. In lateral view, ( Fig. 15 ) phallic apparatus broad basally, narrow in middle, distal apex slightly upcurving; in ventral view ( Fig. 16 ) ventral subapical keel short and broad; phallotremal sclerite small, in lateral view ( Fig. 15 ) horizontal and situated dorsally, following upcurving endothecal process.

Distribution. China (Hainan, Tibet), Vietnam, Malaysia, Thailand, Indonesia (Sumatra, Java, Bali, Lombok), India (Assam).

Figures

FIGURES 12–16. Potamyia flavata (Banks 1934), male genitalia. 12, left lateral; 13, dorsal; 14, right inferior appendage, ventral; 15, phallus, left lateral; 16, phallus ventral.